Tire pressure detecting device which compares driven and driving

Details Tire pressure detecting device which compares driven and driving Tire pressure detecting device which compares driven and driving

1997-09-23

1999-08-17

Oen, William

Measuring and testing

Tire, tread or roadway

Tire inflation testing installation

340444, B60C 2302

Patent

active

059396261

ABSTRACT:
When pressure in any one of tires of a vehicle becomes abnormally low, the tire pressure detecting device detects it and gives a warning to a driver. The tire pressure detection is solely performed based on a value calculated by an on-board micro computer from wheel speeds of each wheel sensed by wheel speed sensors. The calculated value to be used for the tire pressure detection must represent correctly the tire pressure. Whenever the calculated value has a possibility to misrepresent the tire pressure, such value is eliminated from the data for judging the tire pressure. When the value is calculated under a situation where any tire is slipping relative to a road surface, it is highly possible that the calculated value misrepresents the tire pressure. The situation where the tire slippage exists is found out by comparing a driving wheel acceleration with a driven wheel acceleration, and the value calculated under such situation is omitted from the data to be used for judging the tire pressure. It is also possible to prohibit calculation of the value when the tire slippage is found out. Thus, the tire pressure is detected with a high reliability.

REFERENCES:
patent: 5561415 (1996-10-01), Dieckmann
patent: 5721528 (1998-02-01), Boesch et al.
patent: 5760682 (1998-06-01), Liu et al.
patent: 5847645 (1998-12-01), Boesch

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